Title:

Silica Deposition in Superheated Geothermal Systems

Authors:

Vijay CHAUHAN, Maria GUDJONSDOTTIR, Gudrun SAEVARSDOTTIR

Key Words:

deposition; OpenFoam; silica; steam

Conference:

Stanford Geothermal Workshop

Year:

2018

Session:

Modeling

Language:

English

Paper Number:

Chauhan

File Size:

672 KB

View File:

Abstract:

Superheated geothermal systems represent two phase system consisting of precipitated silica in dispersed phase with the superheated steam. The work presents computational approach to predict silica transport and deposition in superheated geothermal systems. Advection diffusion model was implemented using OpenFoam. The model includes effect of Brownian diffusion, turbulent diffusion, turbophoresis, Saffman lift force, drag force and thermophoresis on silica particle motion. The OpenFoam solver developed was validated for gas particle flows showing good agreement. Deposition characteristics of silica particles in superheated steam flow were studied.


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